The document discusses verification and validation (V&V) in software engineering. It defines V&V, describes the structure of a test plan, and explains different V&V methods like white-box testing, black-box testing, and software inspections. V&V helps ensure software systems meet requirements, find bugs before delivery, and verify performance. A V-model approach plans tests at each development stage. V&V is essential as it allows finding errors early and ensures software meets customer expectations and requirements.

1. Group 3:Johannes Bönner, Luka Hale, Paul KnulstChristian Knutz, Tim JanssenVerificationand Validation

2. Do youhaveanyQuestions?Pleaseaskthem after thepresentation!

3. ContentDefinition of validation and verificationStructure of a test planHow to plan V&VMethods of V&VWhy is V&V essential in software engineeringQuestions

4. We need verification and validation to……ensurethatthesoftwaresystemmeetstherequirementsofthecustomer… ensurethatthesystemsperformanceisacceptable … find errorsandbugs in thesystembeforeitisdeliveredtothecustomer

5. Validation vs. VerificationValidation:Doesthe System reallymeettherequirementsandexpectaionsofthecustomer?"Are we building the right product”.Verification:

6. Doesthesystemmeetthefunctionaland non functionalrequirements?

7. "Are we building the product right”.Structureof a softwaretest planIs not a staticdocument, but envolvesduringthedevelopmentHastocontain:The testprocedureTraceabilityofrequirementsTestedproductsSchedulingoftestsTest recordingproceduresHard- andsoftwarerequirements

8. Howto plan V&V?V-ModelDesingingtestsforeverystageofthesoftwaredevelopementExecute thetests in reverse orderDidwedevelopthesystemaswewantedto?

9. MethodstoverifyandvalidatesoftwaresystemsWhite-Box-Testing (Integration tests)The testerasaccsesstothesourcecodeThe testerhasknowledgeoftheinnerfunctionalityofthesystemAdvantages:Low costsSupport bydevelopingtools (like Unit-Test creation in Netbeans)Disantvantages:NosystemrequirementsaretestesWorkflow errorscouldstayundetected

10. MethodstoverifyandvalidatesoftwaresystemsBlack-Box-Testing (Delivery-Tests)The testerhasnoaccsesstothesourcecodeThe testerhasnoknowledgeoftheinnerfunctionalityofthe SystemAdvantages:Tests ifthesystemmeetsthegivenrequirementsTests the hole system in workflowsituationsDisadvantages:High costsNovisibleresultslikeerrormessagesorthrownexceptions

11. MethodstoverifyandvalidatesoftwaresystemsSoftware inspectionGoal: identifyingdefectsImportantRoles:AuthorModeratorInspectorReaderRecorder

12. MethodstoverifyandvalidatesoftwaresystemsAutomatedstaticanalysisCode will not beexecutedHelpsto find:UnreachablesourcecodeVariables whichare not inizializiedMissingoverridestatementsWeknowthisbecauseofpluginslike checkstyle

13. Whyis V&V so essential in sofwareengineering?Makesitpossibleto find erroswhiledevelopingsoftwareEnsurethatthesoftwaremeetstheexpectationsofthecustomerEnsurethat all functionsconformtotherequirements

14. Howare V&V linkedtosoftwaredevelopementprocesses?The developmentprocessand V&V arelinkedheavilybecause:ItmakesiteasiertomeetthereqiurementsIthelpstoreducecostsoftestingIthelpstoimprovethesoftwarequalityA goodexampleforthislinkingisthe V-Model wedescribedearlier

15. Never testtobesurethatthesoftwarehasnodefects!!!Becausethatis just impossible